So why use 3M cable assemblies for PCIe extender card applications? The innovative Twin Axial Cable has proven signal integrity characteristics. 3M has thoroughly tested the product across a variety of lengths. When developing the product, 3M engineers applied their deep understanding of the materials and design of PCBs, connectors and cables. They have also developed a loss function to determine attenuation at any given length and frequency. With this valuable tool, one can determine the optimum design of interconnect for the application.